Analysis of the albino-locus region of the mouse. III. Time of death of prenatal lethals

Journal Article · Tue May 01 04:00:00 EDT 1979 · Genetics; (United States)

OSTI ID:5393447

Russell, L B; Raymer, G D

The stage at which homozygotes die was determined for 28 mutations (general symbol c*) at the albino (c) locus, of which 26 had earlier been found to be probably prenatally lethal. Within each of the mutant stocks, the uterine contents of c*/c/sup ch/ females, made pregnant either by c*//c/sup ch/ males (Ex series) or by c/sup ch//c/sup ch/ males (Co series), were examined between 13 and 17 days postconception. Altogether, 743 females were dissected and 7197 corpora lutea (representing ovulations) counted. In selected stocks, an additional 40 and 13 females were dissected on days seven or nine, respectively. In each of the 26 presumed prenatally lethal mutants, there was a deficiency of living fetuses in the Ex, as compared with the Co, group. Overall, this deficiency was 23.6% (expectation, 25% c*/c*). All meaningful excesses were in numbers eigher of moles (death shortly before, during, or just after implantation), or of early preimplantation losses. Homozygotes in none of the mutant stocks die between days nine and 19 postconception. Of 24 c-locus mutants known to be deficiencies since they lack the closely linked Mod-2, 13 clearly kill before implantation, ten around implantation, and one neonatally. The c and Mod-2 loci and the region between them are not needed for intrauterine survival. There are indications that the distinction between early-preimplantation death and implantation death may, in a general way, be related to length of the deficiency.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 5393447
• Journal Information: Genetics; (United States), Journal Name: Genetics; (United States) Vol. 92:1; ISSN GENTA
• Country of Publication: United States
• Language: English

Related Subjects

550400 -- Genetics
560152* -- Radiation Effects on Animals-- Animals
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
FETUSES
GENE MUTATIONS
GENETIC EFFECTS
GENETIC RADIATION EFFECTS
LETHAL MUTATIONS
MAMMALS
MICE
MORTALITY
MUTATION FREQUENCY
MUTATIONS
RADIATION EFFECTS
RADIOINDUCTION
RODENTS
VERTEBRATES